Adhesives, sealants, coatings and polymer compositions containing monohydroxylated polydienes in hydroxyl functional resins

Abstract

Adhesives, sealants, coatings and polymer blends made with conjugated diene polymers having about one terminal hydroxyl group per molecule reacted with conventional epoxy or acrylic resins.

I claim: 
     
       1. A coating, adhesive or sealant composition comprising a compound made by: reacting a monohydroxylated conjugated diene polymer having a peak molecular weight from 500 to 20,000 with a diisocyanate or multifunctional isocyanate to form a modified curing agent;   reacting the modified curing agent with an epoxy resin or an acrylic resin having hydroxyl groups.   
     
     
       2. The composition of claim 1, wherein the monohydroxylated conjugated diene polymer is a hydrogenated monohydroxylated 1,3-butadiene polymer having from 30% to 70% 1,2-addition and a residual unsaturation less than 10%. 
     
     
       3. The composition of claim 2, wherein the 1,3-butadiene polymer is reacted with a trifunctional isocyanate curing agent. 
     
     
       4. The composition of claim 3, wherein the modified curing agent is reacted with an epoxy resin. 
     
     
       5. The composition of claim 4, wherein the reaction between the epoxy resin and the modified curing agent is catalyzed by addition of dibutyl tin dilaurate. 
     
     
       6. A coating, adhesive or sealant composition comprising with a compound made by: reacting a monohydroxylated conjugated diene polymer having a peak molecular weight of from 500 to 20,000 with a diisocyanate to form an isocyanate functional polymer;   reacting the isocyanate functional polymer with an epoxy resin or an acrylic resin having hydroxyl groups to form a modified resin; and   reacting the modified resin with a curing agent selected from the group consisting of isocyanates, melamines, and polyamines.   
     
     
       7. The composition of claim 6, wherein the monohydroxylated conjugated diene polymer is a hydrogenated monohydroxylated 1,3-butadiene polymer having from 30% to 70% 1,2-addition and a residual unsaturation less than 10%. 
     
     
       8. The composition of claim 7, wherein the 1,3-butadiene polymer is reacted with a diphenylmethane diisocyanate. 
     
     
       9. The composition of claim 8, wherein the isocyanate functional polymer is reacted with an epoxy resin. 
     
     
       10. The composition of claim 9, wherein the modified resin is reacted with an isocyanate curing agent.